package cn.icatw.gulimall.seckill.scheduled;

import cn.icatw.gulimall.seckill.service.SeckillService;
import lombok.extern.slf4j.Slf4j;
import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;

import java.util.concurrent.TimeUnit;

/**
 * @author icatw
 * @date 2022/4/4
 * @email 762188827@qq.com
 * @apiNote 秒杀商品的定时上架任务：
 * 每天晚上3点：上架最近三天需要秒杀的商品
 * 当天00:00:00-23:59:59
 * 明天
 * 后天
 */
@Service
@Slf4j
public class SeckillSkuScheduled {
    @Autowired
    SeckillService seckillService;
    @Autowired
    RedissonClient redissonClient;

    private final String upload_lock = "seckill:upload:lock";

    @Scheduled(cron = "0 * * * * ?")
    public void uploadSeckillSkuLatest3Days() {
        //TODO 幂等性处理
        //1、重复上架无需处理
        log.info("上架秒杀的商品信息");
        //使用分布式锁解决幂等性问题，锁的业务执行完成，状态已经更新完成，释放锁以后，其他人才能获取到最新的秒杀信息
        RLock lock = redissonClient.getLock(upload_lock);
        lock.lock(10, TimeUnit.SECONDS);
        try {
            seckillService.uploadSeckillSkuLatest3Days();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            lock.unlock();
        }
    }
}
